http://en.wikipedia.org/wiki/Titanic_II
Of course, the ability to have steady power & propulsion on large ships is essential.
http://en.wikipedia.org/wiki/Titanic_II#Power_plant_and_propulsion
It is hoped that a very reliable power generation & distribution system is designed. With an appropriate level of redundancy built in, then it would be very unlikely for the ship to ever have a catastrophic systems failure & become, dead+in+the+water.
http://desertshapes.blogspot.ca/2013/02/shit-shape-vs-shipshape.html
